SU1664850A1 - Process for applying face rubber coating to simulated leathery surface - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to light industry and makes it possible to obtain material from split from pork skins. The treated bakhtarm split from pork skins is impregnated with acrylic emulsion on the bakhtarma side and treated on the cutting side with an aqueous solution of the chromostearate complex. The prefabricated polymer tape is crushed by a high-speed tool with simultaneous spraying of the resulting aerosense on the split of the following composition, wt%: styrene-butadiene rubber SKS-30 ARKPN 45.10 - 46.79, styrene-butadiene rubber BS-45 AHF 9.36 - 11 , 05, sulfur of the hammer 0.75 - 0.95, captax 1.80 - 1.90, diphenylguanidine 1.40 - 1.52, zinc oxide 4.68 - 4.78, mineral oil 2.43 - 2.60 , chalk 10.95 - 11.69, thiuram 0.90 - 0.94, soot white BS-50 14.03 - 14.70, stearin 1.61 - 1.78, 4-methyl-6-tributylphenol 0, 47 - 0.51, polypropylene 2.34 - 2.40 and pigments 1.38 - 1.42. Spraying is carried out with a voltage of electrofloors of 30–50 kV, and compaction, embossing and vulcanization are carried out at 120–128 ° C and a pressure of 0.20–0.25 MPa for 12–16 minutes. 1 hp ff, 3 tab.

Description

The invention relates to light industry and can be used when finishing the split from pork skins.

The purpose of the invention is to obtain material from the skin of pig skin.

According to the method of applying a rubber face coating with an imitation of a skin-like surface by spraying a high-voltage rubber compound in a plastoelastic state containing synthetic SC-ZOARKPN and BS-45AKN synthetic rubber-accelerated butadiene rubber, accelerator, vulcanising, vulcanizing, rubber, accelerator, vulcanising, vulcanizing, rubber, rubber, rubber, rubber, rubber, rubber, rubber; zinc oxide, stearin, mineral oil, thiuram, antioxidant and pigments, followed by compaction, embossing and vulcanization, the rubber mixture additionally contains polypropylene ylene, captax and diphenylguanidine as a vulcanization accelerator, white BS-50 as chalk filler and soot, and 4-methyl-6-tributylphenol as the anti-aging agent in the following ratio of components, May. %:

Butadiene-styrene rubber SKS-ZOARKPN45,10-46,79

BS-45 AKH9,36-11,05 styrene butadiene rubber

Sulfur hammer 0.75-0.95

Kaptaks 1.80-1.90

Diphenylguanidine1.40-1.52

Zinc Oxide4.68-4.78

Mineral oil 2.43-2.60 Mel10.95-11.69

Thiuram0.90-0.94

Bela Soot BS-5014,03-14,70

Stearin1,61-1,78

4-Methyl-6-tributyl-phenol0.47-0.51

Polypropylene 2,34-2,40

Pigments1,38-1,42

in this case, the coating is sprayed onto the split from pork skins under a voltage of electrofloor 3Q-50 kV, and compaction, embossing and vulcanization is carried out at 120-128 ° С and a pressure of 0.20-0.25 MPa for 12 16 min

The method is carried out as follows.

The prepared split is placed on the conveyor and fed to the coating device, where the split is applied, in an electrostatic field, to an aero-suspension of the polymer composition, the compositions of which are given in table. one.

The coating is applied by dispersing the polymer composition with a high-speed tubi grinding tool in an open crushing cycle with simultaneous spraying of the resulting aero-suspension on the split. When crushing, a tool with a fine-tooth cutter rotating at a speed of 2800-3000 rpm is used.

Then the coated split enters the compaction device with simultaneous heat treatment and embossing. After that, the skin is ready to go to the screening table for quality control, to devices for measuring area, to marking and packaging.

The results are shown in Table. 2. In example 1, the recipe 1 from table 1 is used, in example 2 - recipe 4, in example 3 - recipe 2.

At a concentration of chromosteatarate complexes of 60 g / l, the water resistance and adhesive interaction of the split and the polymer practically do not increase, and at

a concentration of 110-120 g / l dramatically increases the consumption of the complexes and significantly increases the rigidity of the skin. Deposition of the coating at an electropotential of less than 30 kV increases the consumption of the polymer mixture and does not ensure uniformity of the coating. When the temperature rises above 128 ° C, the skin stiffness increases, while the pressure drops below 0.2 MPa and the time is less than 12 minutes, the adhesion of the coating to the split decreases.

Indicators of physicomechanical and hygienic properties of the skin, obtained by the proposed method, in comparison with the indices of leather produced by a known method, are given in table. 3

Using the proposed method of applying a rubber facial coating with an imitation of a leather-like surface makes it possible to obtain material from a split from pigskins.

Claims (2)

Claim 1, a method of applying a rubber face coating with imitation of a skin-like surface by spraying onto a fibrous base in an electric field of high-voltage rubber compound in the plastoelastic state containing synthetic rubbers, styrene-butadiene SKS-30 ARKPN and BS-45 AKN , ground sulfur, vulcanization accelerator, filler, zinc oxide, stearin, mineral oil, thiuram, antioxidant and pigments, followed by compaction, embossing and vulcanization, characterized in that neither the material from the pork skin split, the rubber mixture additionally contains polypropylene, captax and diphenylguanidine as a vulcanization accelerator, BS-50 chalk and white carbon black as a filler, and 4-methyl-6-tributylphenol as an antioxidant in the following the ratio of components, wt.%: Styrene butadiene rubber SKS-30 AR KP N45, 10-46, 79 Butadiene-styrene rubber BS-45 AKH9.36-11,05 Sulfur hammer 0.75-0.95 Kaptaks 1.80-1.90 Diphenylguanidine1.40-1.52 Zinc Oxide4.68-4.78 Mineral oil 2.43-2.60 Mel10.95-11.69 Thiuram0.90-0.94 Bela Soot BS-5014,03-14,70 Stearin1,61-1,78 4-Methyl-6-tributyl-phenol0.47-0.51 Polypropylene .2,34-2,40 Pigments1.38-1.42 at the same time, compaction, embossing and vulcanization are carried out at a temperature of 120-128 ° C and a pressure of 0.20-0.25 MPa for 12-16 minutes. 2. A method according to claim 1, characterized in that the coating is sprayed onto the split from pigskins under an electric field voltage of 30-50 kV. Table 1 one The indicators for the method proposed 2 t Strength at stretching 10 MPa, not less, MPa 1.4 Stress in case of cracking of the coating (10 MPa), not less than, MPa Elongation at stretching 10 MPa,% Coating resistance to multiple bending, not less than, score Air permeability cm2 / cm2, h Vapor permeability, mg / cm2. h Permeability, min Table 3 famous 1.4 1.4 1.4 4.04.04.04 114,2105,1 2.92.7 109117180-230